Down-hole mechanical movable-sieve jig

Abstract

The invention relates to an underground mechanical movable sieve jig, which overcomes the defects of easy coal leakage, and the like in the prior art, and has the advantages of adapting to underground work, having safety and reliability, reducing environmental pollution, and the like. The movable sieve jig comprises a box body, a movable sieve body and a material lifting mechanism. The technical key points comprise: the movable sieve body can be provided with a height-adjustable overflow weir; the material lifting mechanism adopts a block coal scraper conveyer and a recrement scraper conveyer which are arranged in parallel, the after-body of the lifting mechanism is positioned on the bottom end of the box body, and the main body thereof is arranged slantways until the headpiece is above the surface of water; two sides of each scraper conveyer are provided with a material-blocking apron plate; the movable sieve is in transitional connection with the two scraper conveyers through a recrement chute, a block coal chute and a sieved-object chute respectively; and a lower outlet of each chute is aligned in the material-blocking apron plates on two sides of the corresponding conveyer respectively. The movable sieve jig has the advantages of compact structural design, reasonable arrangement, ensured noninterference of the running of the movable sieve, flexible adjustment and reliable running, improves the adaptability to matching with a main underground conveying system, and remarkably improves the quality of the discharged materials and the sorting efficiency.

Description

technical field [0001] The invention relates to a sorting equipment used in underground coal mines, in particular to an underground mechanical dynamic sieve jig suitable for sorting 25-350mm grain size coal. Background technique [0002] Existing moving screen jig mainly has three kinds of structures: one is a hydraulic (electromechanical-hydraulic integration) type moving screen jig, such as the "hydraulic moving screen jig" whose patent announcement number is CN2524865Y, which discloses A hydraulic dynamic screen jigging machine composed of hoist, hydraulic control device, electrical control device, etc. The high frequency of the jigging machine brings insurmountable difficulties to the hydraulic system, frequent failures, difficult operation and maintenance, and operation high cost. The second is a mechanical dynamic sieve jig, such as the "stop-stop reciprocating mechanical dynamic sieve jig" of CN2451234Y, which discloses an intermittent dynamic sieve jig suitable for ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an improved underground mechanical moving screen jig, which solves the defects of the prior art, such as large space occupation and easy coal leakage, and retains its safety and reliability for underground operations and reduces costs. In addition to the advantages of reducing environmental pollution, its compact structure design, easy installation, and reasonable layout ensure that the moving screen body does not interfere with the operation, the adjustment of coal passing capacity and gangue passing capacity is flexible and reliable, and the separation of lump coal and gangue is accurate. The adaptability matched with the main underground transportation system can significantly improve the discharge quality and sorting efficiency

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